FKCOM FK Comae Berenices-type variables. These are rapidly rotating
giants with nonuniform surface brightnesses, which have G-K spectral
types with broad H and K Ca II emission and sometimes Halpha.
They may also be spectroscopic binary systems. Periods of light
variation (up to several days) are equal to rotational periods,
and amplitudes are several tenths of a magnitude. It is not
excluded that these objects are the product of further evolution
of EW (W UMa) close binary systems (see below).